// 该文件在许多文件中都用到，是主要配置文件，包含静态文件的路径，是否开启sourceMap等，其中，分为两个部分dev（开发环境的配置）
// 和build（生产环境的配置）
'use strict'
// Template version: 1.1.3
// see http://vuejs-templates.github.io/webpack for documentation.

const path = require('path')

module.exports = {
  // production生产环境
  build: {
    // 构建环境
    env: require('./prod.env'),
    // 构建输出的index.html文件
    index: path.resolve(__dirname, '../dist/index.html'),
    // 构建输出的静态资源路径
    assetsRoot: path.resolve(__dirname, '../dist'),
    // 构建输出的二级目录
    assetsSubDirectory: 'static',
      // 构建发布的根目录，可配置为资源服务器域名或CDN域名
    assetsPublicPath: '/',
    productionSourceMap: true,
    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false,
    productionGzipExtensions: ['js', 'css'],
    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  },
  // dev 开发环境
  dev: {
    env: require('./dev.env'),
    // 端口号
    port: process.env.PORT || 8081,
    // 是否自动打开浏览器
    autoOpenBrowser: true,
    assetsSubDirectory: 'static',
    // 编译发布的根目录，可配置为资源服务器域名或CDN域名
    assetsPublicPath: '/',
    // proxyTable代理的接口（可跨域）
     // 使用方法：https://vuejs-templates.github.io/webpack/proxy.html
    proxyTable: {},
    // CSS Sourcemaps off by default because relative paths are "buggy"
    // with this option, according to the CSS-Loader README
    // (https://github.com/webpack/css-loader#sourcemaps)
    // In our experience, they generally work as expected,
    // just be aware of this issue when enabling this option.
    // 默认情况下，关闭css Sourcemaps，因为使用相对路径会报错
     // CSS-Loader README：https://github.com/webpack/css-loader#sourcemaps
    cssSourceMap: false
  }
}
